frankie_frank1 Posted November 12, 2007 Share Posted November 12, 2007 I mistakenly set my D40X camera to ISO 1600 under a bright environment. Will the photo come out more grainy than ISO 100 or ISO 200? Under a bright sunny day, will ISO 100 photo come out better than ISO 200? Link to comment Share on other sites More sharing options...
rainer_t Posted November 12, 2007 Share Posted November 12, 2007 iso1600 more grainy than iso100? ... Very likely yes. iso100 better than iso200 on a sunny day? ... Technically yes ... practically you'll not see it. Link to comment Share on other sites More sharing options...
bill_keane2 Posted November 12, 2007 Share Posted November 12, 2007 It'll be interesting to let everyone know what you find. Why? Because newer cameras tend to handle noise better, and for freezing action, using ISO 1600 on a sunny day could work really well. Check the shadows of the image, or areas under exposed -- that's where you migh see some mottledness. Maybe post a small JPEG here? Link to comment Share on other sites More sharing options...
toddcwilson Posted November 12, 2007 Share Posted November 12, 2007 If the scene was properly exposed you should be okay - if there are dark shadows in the scene then you will have noise in these areas. ISO 1600 vs. ISO 100 on any camera will have more noise (and any film will have more grain) and less detail in the colors. Proper exposure on a sunny day at ISO 1600 ... you must have had a very fast shutter speed and very small aperture to stop down light - otherwise you most likely have some really blown highlights. Answer to question 2 - depends on whether you have a properly exposed scene. If you are shooting at f/2.8 to control the depth of field and throw out (blur) a busy background and are shooting toward the direction of the sun, the yes, ISO 100 will most likely be better than ISO 200 to save the highlights. Link to comment Share on other sites More sharing options...
kari v Posted November 12, 2007 Share Posted November 12, 2007 It can be surprisingly good. Even p&s cameras that generate horrible noise at ISO400 look quite ok in bright light. I hope you didn't underexpose... that can be seriously visible. Link to comment Share on other sites More sharing options...
paul_ferrante Posted November 12, 2007 Share Posted November 12, 2007 I accidentally did the same thing, forgot to reset it from a the previous day. The pictures were dark and very grainy. You can fix the dark but the not the grainy (at least I couldn't). The pictures were a complete loss. Live and learn. ;>( Link to comment Share on other sites More sharing options...
pierre_c1 Posted November 12, 2007 Share Posted November 12, 2007 I second the answers above... And if you want the grainy look, but you have lots of light, better shoot ISO 100 and add noise in post-prod, because you can control how it looks. Sensor noise doesn't look as good as Tri-X grain ;) Link to comment Share on other sites More sharing options...
markd2 Posted November 12, 2007 Share Posted November 12, 2007 <i>I accidentally did the same thing, forgot to reset it from a the previous day</i> <p> The D200 (and presumably other models) have the two buttons with green dots next to them. Hold them down until the display flashes to reset many of the often-tweakable options (ISO, shooting mode, flash/EV compensation, etc). After I take the camera out of the bag, I do the two-button reset, then Qual+dial once or twice to go to the jpeg or raw mode I want. Link to comment Share on other sites More sharing options...
heartyfisher Posted November 12, 2007 Share Posted November 12, 2007 Did the same thing and left the ISO at 1000 from the previous night. and it was NOT a total loss. I was surprised at the quality. If you exposed correctly try putting the files through noise reduction software. Link to comment Share on other sites More sharing options...
frankie_frank1 Posted November 12, 2007 Author Share Posted November 12, 2007 I mistakenly kept ISO-1600 setting from previous shootings and was using 18-135 f/4-5.6 zoom plus SB-800. Then I took ouple of bright indoor with flash on and apexture priority at maximum. The pictures came out very good, no difference from low ISO settings. That made me wonder where the grains went to? Link to comment Share on other sites More sharing options...
frankie_frank1 Posted November 12, 2007 Author Share Posted November 12, 2007 Cont'd. That was why I post question if all new cameras can handle high ISO grain or the camera automatically force a lower ISO (not likely) or I should call the police that I lost the grains I had before. Link to comment Share on other sites More sharing options...
frankie_frank1 Posted November 12, 2007 Author Share Posted November 12, 2007 Cont'd I don't know how ISO circuitry works inside a digital camera. If it is like an amplifier where its amplification depends on the volume control, then the noise depends on how much volume control we need. The lower the volume, the less noise. In a bright suuny day, even in high ISO settings, internal circuitry (volume control) is only lightly turned on. That is why there is no noise (grain). In low light environment, internal circuitry push the signal from the sensor higher and create noise. For low ISO settings, internal circuitry gain is limited. That is why there is almost no noise (grain) even in under-exposed cases. These are just my guess. Correct me if I am wrong. Link to comment Share on other sites More sharing options...
albertdarmali Posted November 12, 2007 Share Posted November 12, 2007 Even if there's not much noise at 1600, however you are sacrificing details since lower ISO definitely capture more details than 1600. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now